(Πολυδεύκης), one of the Dioscuri, is commonly called Pollux and the twinbrother of Castor. (Hom. Il. 3.237; Apollod. 3.11.1; comp. DIOSCURI.)
[L.S]A Dictionary of Greek and Roman biography and mythology
Smith, William
A Dictionary of Greek and Roman biography and mythology. William Smith, LLD, ed. 1890